SOLUTION: I have no clue how to start off with this problem. Any help would be great.
Dish antennas have a parabolic cross-section. This concentrates signals onto a sensor at the focus of
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-> SOLUTION: I have no clue how to start off with this problem. Any help would be great.
Dish antennas have a parabolic cross-section. This concentrates signals onto a sensor at the focus of
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Question 1140704: I have no clue how to start off with this problem. Any help would be great.
Dish antennas have a parabolic cross-section. This concentrates signals onto a sensor at the focus of the parabola. A dish antenna is 1 meter wide and 20 centimeters deep. How far from the bottom of this dish should the sensor be positioned? Found 2 solutions by josgarithmetic, greenestamps:Answer by josgarithmetic(39620) (Show Source):
You can put this solution on YOUR website! Draw or sketch parabola with vertex at Origin, and vertex the minimum.
Two points are (0,0) and (1,20) (100, 20) (50, 20).
There are two problems with the solution by tutor @josgarithmetic:
(1) The "1" width is meters; the "20" depth is centimeters. You need to use consistent units. Changing the 1 meter to 100 centimeters, the second point on the parabola would be (100,20) instead of (1,20).
(2) The 100 centimeters is the total width of the parabola; the second point on the parabola is only half that distance from the vertex. The correct second point on the parabola is (50,20).
So now
where p is the distance from the vertex (bottom of the dish) to the focus the sensor). Using the second point (50,20),
ANSWER: The sensor should be placed 125/4 = 31.25 cm from the bottom of the dish.
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